You should use “Product feed extension” to drive more conversions in a simple and cost-effective way in a single automated Video action campaign.

• Location
• Lead form
• Product feed
• Sitelinks

The correct answer is: Product feed

Explanation: To drive online sales in a video action campaign in a simple and cost-effective way, add a product feed to your Video campaign. This will turn your YouTube video ads into a virtual shopfront and show browsable product imagery below your video ads, inspiring customers to make a purchase. On average, advertisers that add product feeds to their Video action campaigns achieve over 60% more conversions at a lower cost. You’ll need to set up a product feed in Merchant Center, link it to your Google Ads account, and make sure your products comply with Google’s shopping and personalized advertising policies. You’ll also need a minimum of four products in the feed with images for each product.

Read more here: https://support.google.com/google-ads/answer/11371384